1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Author: 4 * Felix Matouschek <felix@matouschek.org> 5 */ 6 7 #include <linux/device.h> 8 #include <linux/kernel.h> 9 #include <linux/mtd/spinand.h> 10 11 #define SPINAND_MFR_XTX 0x0B 12 13 #define XT26G0XA_STATUS_ECC_MASK GENMASK(5, 2) 14 #define XT26G0XA_STATUS_ECC_NO_DETECTED (0 << 2) 15 #define XT26G0XA_STATUS_ECC_8_CORRECTED (3 << 4) 16 #define XT26G0XA_STATUS_ECC_UNCOR_ERROR (2 << 4) 17 18 static SPINAND_OP_VARIANTS(read_cache_variants, 19 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 1, NULL, 0), 20 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), 21 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0), 22 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0), 23 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0), 24 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0)); 25 26 static SPINAND_OP_VARIANTS(write_cache_variants, 27 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0), 28 SPINAND_PROG_LOAD(true, 0, NULL, 0)); 29 30 static SPINAND_OP_VARIANTS(update_cache_variants, 31 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0), 32 SPINAND_PROG_LOAD(false, 0, NULL, 0)); 33 34 static int xt26g0xa_ooblayout_ecc(struct mtd_info *mtd, int section, 35 struct mtd_oob_region *region) 36 { 37 if (section) 38 return -ERANGE; 39 40 region->offset = 48; 41 region->length = 16; 42 43 return 0; 44 } 45 46 static int xt26g0xa_ooblayout_free(struct mtd_info *mtd, int section, 47 struct mtd_oob_region *region) 48 { 49 if (section) 50 return -ERANGE; 51 52 region->offset = 1; 53 region->length = 47; 54 55 return 0; 56 } 57 58 static const struct mtd_ooblayout_ops xt26g0xa_ooblayout = { 59 .ecc = xt26g0xa_ooblayout_ecc, 60 .free = xt26g0xa_ooblayout_free, 61 }; 62 63 static int xt26g0xa_ecc_get_status(struct spinand_device *spinand, 64 u8 status) 65 { 66 status = status & XT26G0XA_STATUS_ECC_MASK; 67 68 switch (status) { 69 case XT26G0XA_STATUS_ECC_NO_DETECTED: 70 return 0; 71 case XT26G0XA_STATUS_ECC_8_CORRECTED: 72 return 8; 73 case XT26G0XA_STATUS_ECC_UNCOR_ERROR: 74 return -EBADMSG; 75 default: 76 break; 77 } 78 79 /* At this point values greater than (2 << 4) are invalid */ 80 if (status > XT26G0XA_STATUS_ECC_UNCOR_ERROR) 81 return -EINVAL; 82 83 /* (1 << 2) through (7 << 2) are 1-7 corrected errors */ 84 return status >> 2; 85 } 86 87 static const struct spinand_info xtx_spinand_table[] = { 88 SPINAND_INFO("XT26G01A", 89 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0xE1), 90 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1), 91 NAND_ECCREQ(8, 512), 92 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 93 &write_cache_variants, 94 &update_cache_variants), 95 SPINAND_HAS_QE_BIT, 96 SPINAND_ECCINFO(&xt26g0xa_ooblayout, 97 xt26g0xa_ecc_get_status)), 98 SPINAND_INFO("XT26G02A", 99 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0xE2), 100 NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1), 101 NAND_ECCREQ(8, 512), 102 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 103 &write_cache_variants, 104 &update_cache_variants), 105 SPINAND_HAS_QE_BIT, 106 SPINAND_ECCINFO(&xt26g0xa_ooblayout, 107 xt26g0xa_ecc_get_status)), 108 SPINAND_INFO("XT26G04A", 109 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0xE3), 110 NAND_MEMORG(1, 2048, 64, 128, 2048, 40, 1, 1, 1), 111 NAND_ECCREQ(8, 512), 112 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 113 &write_cache_variants, 114 &update_cache_variants), 115 SPINAND_HAS_QE_BIT, 116 SPINAND_ECCINFO(&xt26g0xa_ooblayout, 117 xt26g0xa_ecc_get_status)), 118 }; 119 120 static const struct spinand_manufacturer_ops xtx_spinand_manuf_ops = { 121 }; 122 123 const struct spinand_manufacturer xtx_spinand_manufacturer = { 124 .id = SPINAND_MFR_XTX, 125 .name = "XTX", 126 .chips = xtx_spinand_table, 127 .nchips = ARRAY_SIZE(xtx_spinand_table), 128 .ops = &xtx_spinand_manuf_ops, 129 }; 130